Feed-water heater.



l110.739,355. Y, y PATENTED'SEPLzz,190s., P. J. sNowDBN..

@BED WATER HEATER.

APPLICATION FII-'ED FEB. 11I 1903.

ATTORNEY PATENTED SEPT. 22, 190,3;

No, 739,355. E

- E P. J. SNOWDEN. FEED WATER HEATER.

APPLICATION FILED FEBE 11l 1903.

3 SHEETS-SHEE'IVL I0 IODEL. y

NEMEN JN VEN TOR.

W/TNESSES l @fa 707 MEE@ .VIS

ite. 739,355'.

UNITED STATES :Patented september 22, 1903.

`lPATENT I OFFICE.

'PERRY J. sNoWDEN, oF ELwooD, knfIDrANA, AsseNoR on ONE-,HALE To sYLvEsTER A. MORGAN, or INDIANAPOLIS, 1ND1ANA;

FEED-wATEFt HEATER.

SPECIFICATION forming part of Letters Patent' Ne. "739,355, dated september 2.a, 1903.

l Application tiled February 1l, 1903.l Serial Ilo. 142.841. (No model.) i

To all' whom it mag/concern:

Be it known that I, PERRY J. SNOWDEN, a

lcitizen of the Unitedl States, residing at Elwood, in the county of Madison and State of Indiana, have invented new and useful Improvements in Feed-Water Heaters, of which the following isa specification.

particularly pointed out in the claims.

The object of my invention is, first, toproduce an .artificial draft whereby the flow of the air through the spaces between the gratebars and the lire thereon'will be accelerated` to promote combustion; second, to provide means whereby the gases passing from the re in the furnace will be thoroughly consumed, and, finally, to provide means whereby the waste heat ,may be utilized forthe'pur-` pose of heating the feed-water supplied to the boiler to increase the efliciency of the latter. I attain these objects by means of the arrangement and construction of boiler-furnace illustrated in the accompanying draw-A ings, in whichsimilar characters of reference designate likeparts throughout the several views.

Figure 1 is a longitudinal sectional View of a steam-boiler furnace, showing my invention applied thereto and taken through the a sectional plan View ,of the same, taken through the line C I). (See Figs."1, 3, and 4.) Fig. 3 isa front end elevational View of the boiler-furnace; and Fig. 4 is a sectional end elevational view of same, taken through the line E F. (See Figs. 1 and 2.)

The boiler 1, which may be Vof any suitable or wellknown type of tubular boiler, is mounted inl the setting 2'over the furnace 3 in the usual well-known manner. rllhe furnace 3 is provided with the furnace-front 4, having the furnace-doors 5, the ash-pit doors 6, the grates 7, and the ash-pit 8. A closingwall 9 is situated at the rear of the furnace 3, and the said Wall is substituted for the usual bridge-wall and is provided with the Iy-furnace3 are forced into the r'ear combustion-chamber lllof the furnace by the steamjet nozzles12, thence up the back uptake 13, through the boiler-tubes 14, into'the front uptake ,15.` A steam-jet nozzle 1 2-is situated opposite each of the passages or exhaust- .ways 10, and all have their jet ends directed towardthe centers of the opposing passages '10, and said steam-'jet nozzles 12 are connected to their connecting-pipe 16, which latter isconnected to the steam-supply pipe 17. The steam-supply pipe 17A is connected to either the mai-n steam-pipe 18 of the boiler l or it may be connected to some portion of the top ofthe boiler 1, wheredry steam may be obtained. lThe connectingpipe 16, being situated'withinthe furnace 3 and subjectedl Itothe intense heat generated therein, must ybe protected. For this purpose I` provide the inner tube or pipe 19,- preferablyof cast-iron,

wherein said pipe 16 is inclosed, and said tube 19 has its ends open for the admission of air and is also provided with the 'nozzleopenings 20, through which t-hesaid nozzles 12 project, and therair admitted-into the ends of saidpipe or casing is discharged through said openings to mix with the gases passing fronrthe furnace 3 through'the'fpassage orv exhaust ways 10. A tubular shield'f2l, of lire-(clay4 o r other refractory material ,sur rounds said tube or'casing 19'to'prote`ct the samefrom the action of vthe heat," generated inthe furnace 3. f

, Inlthe ordinary steam-boilejrll furnace the 'unconsumed gases. and smoke'p'ass immediately from thel forward or front uptake into a breeching conectedto a smokey-.stack or directly intoa stack,"'and a quantity of heat iscarried away with'fthe'escaping gases without being utilized'. In order that'the heat in said waste gases may be utilized, 'I'c'onstruct the top side walls 23 and 24to extend longitudinally of the boiler-setting 2 the' entireflength of the boiler l, andpthe dividing-wall 25 is situated intermediate the outer walls 23 and' 24 and extends from the front of the boiler 1 .backwardly to withink a short distance of the end thereof, thereby forming a return passage-wayt26 and connecting' the ends ofl the paralleltlueways 27 and 28. The top portions of said flueways 27 and 28 are closed by IOO their arches 29 and 307 which extend the entire length of said ways, and said Ways are closed at their front ends by the front breeching or casing 31, which connects with the smoke-stack in the usual manner, and said flueways 27 and 28 are separated at their frontends by the dividing-plate 32. The rear ends of said parallel lues are closed by suitable doors 33 and 34.

In each of the flueways 28 and 29 are arranged to extend longitudinally therein the feed-Water circulating and heating pipes 35 and 36, and said pipes are of greater diameters than their supply-pipes 37, by which latter the feed-water is supplied to said circulating-pipes for the purpose of reducing the velocity of the dow of the water therethrough and permitting said feed-water to be subjected to the heat of the passing gases a longer time to materially raise the temperature of said feed-water before admitting the same into the boiler. The arrangement and construction of the feed-Water pipes 35 and 36 I will now proceed to describe.

The water-supply pipe 38 extends from the source of supply, as a force-pump, and is provided with a regulating-valve 39. From the top L end 40 of said feed-water-snpply pipe 38 horizontally extend the right and left hand branch pipes 37, which are connected, respectively, to the ends of the feed-watercirculating pipes 35 and 36 by the couplings 41 and 42, and the said circulating-pipes 35 and 36 are connected at their opposite ends to the circulating-pipes 43 and 44, respectively, by the T connections 35t and 36, the connecting-pipes 45 and 46, and the T connections 45t and 462 and said pipes 43 and 44 are connected at their opposite ends to the circulatingpipes 47 and 48 by the T connections 43t and 442 the connecting-pipes 49 and 50, and the T connections 49 and 50, and said pipes 47 and 48 are connected at their opposite ends to the circulating-pipes 51 and 52 by theT connections 47t and 482 the con necting-pipes 53 and 54, and the T connections 531r and 54, and said circulating-pipes 5l and 52 are connected at their opposite ends to the circulating-pipes 55 and 56 by the `T connections ltand 522 the connecting-pipes 57 and 58, and the T connections 57t and 58% and the opposite ends of said circulating-pipes 55 and 56 are connected to their circulating and collecting drums 59 and 60 at the bottom or near the bottom ends thereof, and connected to or near the top ends of said drums 59 and 60 are the return circulating-pipes 61 and 62, which pipes are of the same diameter as the circulating-pipes above described and extend from said drums 59 and 60 along the interiors of the top parallel iues 28 and 29 to the front of the boiler 1 and in positions relatively thereto to be connected to said front of boiler` by the connecting-pipes 63 and 64, by which lat'- ter the heated feed-water is fed directly into the said boiler, and the said feed Water is thus circulated back and forth in said circulating-pipes till it has attained a high degree of temperature. The usual elbow-fittings might be employed to connect the ends of said circulating-pipes instead of the T-tittings described; but I prefer to employ the latter, which have their rear open ends plugged or closed by the plugs p, for the reason that the removable plugsp of each of the end T-ittings of any of the circulating-pipes may be readily removed, and thus permitting the operator to remove all deposit or obstructions from the interior of said circulating-pipes Without trouble.

Any suitable mud-cock or blow-out valve 65 may be connected to the bottoms of each of the collecting-drums 59 and 60 for the purpose of blowing out said drums to remove deposit therefrom.

The practice of my invention I will now proceed to describe: To start the furnace, a light fire is rst made on the bars 7 of the furnace 3 and is gradually increased as the steam is generated in the boiler 1, and when the steam in said boiler has attained a pressure suflicient to operate the steam-jet nozzles 12 the full complement of fuel may be added to the fire. The ash-pit doors 6 are now opened, and the steam is turned on to operate the steamjet nozzles 12, which, being directed toward and situated opposite the openings 10, discharge a continuous jet of steam through said openings to create a vacuum in the furnace 3, and thereby cause an acceleration of the flow of atmospheric air through the spaces between the grate-bars 7 to and through the tire thereon to thoroughly consume the combustible gases generated and escaping from the fuel. The iiow of air int-o and through the nozzle-openings 2O of the protecting-pipe 19, surrounding the connecting-pipe 16, is also accelerated, and the sameis thoroughly mixed with the unconsumed combustible gases that are forced through the openings 10 into the rear chamber 11 on the opposite side of the dividing or closing wall 9 to be consumed therein. The ame resulting from the combustion of the gases in the chamber l1 and the hot gases now ascend the back uptake 13 and pass through the tubes 14, thence into the front uptake or smoke-chamber 15, thence through the tlueway 27 to and through the passage 26, and nally through the iue- Way 28 into the breeching 31 into a stack connected to the latter.

Thefeed-water-circulating tubes are preferably divided into two sections or series, a right-hand section or series and a left-hand section or series, and each of said sections or series of circulating-pipes are connected to separate and independent collecting-drums 59 and 60, as previously described, the object of such arrangement being particularly to divide the dow of the feed-Water into two circulating systems and lessen the probability of obstruction by deposit and to reduce thc Velocity of the flow of the feed-water through each of the series of circulating-pipes.

IOO

IIO

Having thus fully described this my invention, what I claim 'as neW and useful, and de-V sire to` cover by Letters Patent of the United States therefor, is-

. 1. In a boiler-fu rnace,the oombin ation With la main furnace, a boiler, a front uptake orl top of said boiler, extending longitudinally thereof and eonneotingthe front uptake and smoke-stack, a' series of return feed-Water tubes situated Within and extending longitudinally of said iiues and removable plugs in the ends of said tubes.

3. In a boiler-furnace, the combination with a main furnace, a front uptake or smokeohamber, and a smoke-stack, of return-flue- Ways situated on and inolosing the top of said boiler extending longitudinally thereof and connecting said front uptake and said smokestaok, a series of return .feed-,Water tubes situated within and extending longitudinally of vsaid iiueways, removable plugs in the ends of said tubes and collecting-drums conneoted to said feed-Water tubes. Y

4. .In a'boiler-furnaoehe combination with a main furnace, a boiler, a front uptake or smoke-chamber and a smoke-stack, of separate parallel return-i'lueways situated on and inclosin g the top of said boile-r, extending longitudinally thereof and connecting said front uptake and said smoke-stack, independent series of feed-Water tubes situated within each and extending longitudinally of said fines, removable plugs in each of the ends of 'said tubes and independent collecting-drums connected to each of said independent series of feed-Water-ciroulating* tubes.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

PERRY J. SNO WDEN.

Witnesses:

. THOMPSON R. BELL,

SYLvEsTER A. MORGAN. 

